A cranberry extract standardized by Ocean Spray Cranberries, Inc. will be placed into capsules in the Saint Elizabeth Regional Medical Center pharmacy. Each cranberry capsule will contain 500mg of cranberry extract. Placebo capsules will be made to look identical to cranberry capsules and will also be made at the Saint Elizabeth Regional Medical Center pharmacy. A staff pharmacist will separate the capsules into a cranberry extract group and a placebo group. A staff pharmacist will randomly assign patients to either the cranberry extract group or the placebo group. The patient, physicians, and research staff involved in data collection will be blinded to patient group assignment.